OLED Display Panel Color-Resistance Shielding for Laser Pixel Repair
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Solution Overview
Problem
The low success rate of pixel repair in OLED panels manufactured with depolarizer technology due to the inability of lasers to penetrate color resistance layers, resulting in unrepaired sub-pixels and reduced display quality.
Innovation Solution
Incorporating a shielding part in the color resistance layer to block light from passing through abnormal light-emitting parts, allowing for laser-based repair without damaging the layer, combined with a black matrix layer to enhance light transmission and reduce color mixing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a color resistance layer is used to replace the polarizer in OLED panel manufacturing, then the panel achieves depolarizer technology benefits, but laser cannot penetrate the color resistance layer to remove conductive material, resulting in low pixel repair success rate
Solution Approach 1:
The color resistance layer is segmented into different types: first type color resistance parts that allow laser penetration for repair operations, and second type color resistance parts that block light for normal display function. This segmentation enables the layer to serve dual purposes - facilitating repair when needed while maintaining display performance during normal operation.
Solution Approach 2:
Different regions of the color resistance layer are assigned different optical properties. The first type color resistance parts have higher laser penetrability for repair operations, while the second type color resistance parts have higher light blocking capability for normal display. This local differentiation resolves the contradiction between repair accessibility and display functionality.
2Manufacturing precision
If the color resistance layer blocks light to prevent bright spots during repair, then repair precision is improved, but light transmission for display quality is reduced
Solution Approach 1:
The color resistance layer is divided into functional segments: first type parts for repair operations with laser penetrability, and second type parts for display function with light blocking. This segmentation allows each region to optimize its properties for its specific function without compromising the other.
Solution Approach 2:
The patent applies different optical characteristics to different local regions of the color resistance layer. Areas requiring repair access have enhanced laser penetrability, while areas requiring display quality have enhanced light blocking. This local quality differentiation enables simultaneous optimization of repair precision and display performance.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Improves the success rate of pixel repair by preventing bright spots and maintaining display quality by blocking light from abnormal regions, thus enhancing the reliability of the repair process.
Implementation Method 1
the first type of color resistance part includes a shielding part that is configured to block light from passing through
Implementation Method 2
when performing the pixel repair, a common laser cannot penetrate the color resistance of a part of colors to remove the conductive material in a corresponding region
Data Source
AI summary
A display panel, a manufacturing method thereof, and a mobile terminal are provided and include: a substrate arranged from bottom to top, a light-emitting layer, and a color resistance layer, wherein the light-emitting layer includes a plurality of light-emitting parts, at least one light-emitting part is a first type of light-emitting part, the color resistance layer includes a plurality of color resistance parts corresponding to a plurality of light-emitting parts on a one-to-one correspondence, each color resistance part is arranged opposite to the corresponding light-emitting part, and in the plurality of color resistance parts, a first type of color resistance part arranged opposite to the first type of light-emitting part includes a shielding part for blocking light from passing through.